As part of my investment portfolio as well as to secure properties for our tear-down/ rebuild business I personally purchase (with my own funds) existing homes in the downtown area of the suburbs we build in with the intention to rent them out over several years and then eventually sell the property to the business to demolish the old homes and tear down/rebuild.

I am currently rebuilding my reserves but don't have much at this time.

That amount depends on the rebuilding cost and not the value of the place.If you do not have a mortgage you are generally free to insure it for whatever you want.

We already used our emergency funds, for a good investment, that we found couple of weeks ago, with the confidence, that we will rebuild this emergency fund after we will sell the house (here comes the Murphy with the ugly grin). 

After 4 years of living in the condo and rebuilding my funds I decided to buy another condo.

Assuming the cost to rebuild from the foundation up (RC) is $150,000 the house depreciated by 1/3 ($150,000 minus $100,000 = $50,000  50,000/150,000 = 1/3).One of the problems or disadvantages of ACV is that on a partial loss the claim payment will be reduced by the percentage of depreciation. 

I want to get creative, but I have no idea how to go about it with the little liquid capital I have at the moment (I am currently rebuilding my capital).

I can across a house which was condemned by city. I am still new in REI . I was wonder how to estimate tear down and rebuilt of house.That way I can give my offer to seller. 

A deck builder build a deck I will have to rebuild soon and a roofer cost me $7000 to rip his new roof off to replace with right away since he installed so badly.

It's practically a rebuild. 70's house that hasn't been touched since the 70's and needs foundation and structural repair.